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Human Chorionic Gonadotropin (HCG) Mass Concentration

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of human chorionic gonadotropin (HCG) in your blood, a hormone produced during pregnancy. It helps track early pregnancy or detect conditions like ectopic pregnancy.

Quick summary

["HCG levels are critical for monitoring pregnancy progression and ruling out serious complications."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
99104-2
Short code
HCG Ur-mCnc
Synonyms
HCG Ur-mCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Ref low
0
Ref high
5
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84702
SNOMED
275917004
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Doctors may order an HCG test to confirm pregnancy, especially if you have missed periods or symptoms like nausea, breast tenderness, or light spotting. It can also be used during early pregnancy follow-ups to check for normal development or detect issues like a miscarriage, molar pregnancy, or ectopic pregnancy.

When Might You Need This Test?

You might need this test if you’re experiencing early pregnancy symptoms, have a positive home pregnancy test, or are undergoing fertility treatments. It may also be done after a miscarriage or ectopic pregnancy to ensure recovery.

What to Expect Before the Test

No special preparation is needed, but inform your healthcare provider about any medications you’re taking, including hormonal birth control or prescription drugs. If you’re pregnant, this test is typically done in a lab setting with a blood draw.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm. The sample is sent to a lab for analysis. Results are usually available within a few days.

Reference range

Non-pregnant: <5 mIU/mLN/A

Specimen: urine

No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

HCG Level

Frequently asked questions

What Are My HCG Test Results Meaning?
Your results will be compared to standard ranges for your stage of pregnancy. A low level may mean the pregnancy isn’t progressing normally, while a very high level could signal a molar pregnancy or other complications. Your doctor will interpret results in the context of your medical history and symptoms.
Can HCG Levels Be Affected by Other Factors?
Yes, certain medications (like some fertility drugs) or conditions (such as kidney disease) can influence HCG levels. Smoking or alcohol use may also impact results. Always report any relevant factors to your healthcare provider.
How Often Are HCG Tests Done During Pregnancy?
During early pregnancy, HCG tests are often done every 48–72 hours to monitor growth. In later stages, tests are less frequent as the hormone levels stabilize. Your doctor will determine the timing based on your pregnancy progress.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy